Circle-swing.



.PATENTED JULY 2, 1907.

M. G. CUMMINGS & S. M. DUNLAP.

CIRCLE SWING. uruonxon FILED NOV.13, 1905 3 SHEETS-SHEET 1.

' lie-858,960. PATBNTED JULY 2, 190w.

M. G. CUMMINGS & s. M. DUNLAP. I

' CIRCLE SWING.

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UNITED STATES PATENT oEE1oE.

MILO G. CUMMINGS AND SYLVESTER M. DUNLAP, OF DES MOINES, IOWA. i

CIRCLE-SWING.

Specification of Letters Patent.

Patented July 2, 1907.

. A li ati fil d November 13,1906. Serial No. 287,003.

To all whom it may concern:

Be it known that we, MILO G. CUMMINGS and SYL- VESTER M. DUNLAP,citizens of the United States, residing in Des Moines, county of Polk,and State of Iowa, having invented a new and useful Improvement inCircle-Swings, of which the following is a specification.

The object of our invention is to provide a circle swing simple, strong,and durable in construction and so designed that all of the seats andall of the mechanism adapted to operate the machine may be suspendedfrom the center-pole.

A further object is to provide a circle swing capable of carrying anumber of passengers with but one or two of the passengers beingnecessary to furnish the motive power.

Our invention consists of certain details of construction hereinafterset forth, pointed out in our claims and illustrated in the accompanyingdrawings, in which Figure 1 shows a perspective view of our device; Fig.2 shows a plan view of a lower turn-table and gearing we employ; Fig. 3shows a detail view of the seats and center-pole; Fig. 4.shows alongitudinal sectional view of the plates of the lower turn-table; Fig.5 shows a side elevation of one of the seats provided with a hand wheel;Fig. 6 shows a longitudinal sectional view of the upper turntable, theupper plate having a collar mounted thereon; Fig. 7 shows a detail viewof the ball ratchet we employ; Fig. 8 shows a longitudinal sectionalview of the hollow pipe, cylindrical shaft, gear wheel and hand wheel weemploy; and, Fig. 9 shows a side elevation view, a portion being insection of the same.

Referring to the accompanying drawings, the reference numeral 10 is usedto indicate a center-pole firmly planted in the ground, to which, ashort distance above the ground, is rigidly secured the under plate 11of a turn-table we employ, the upper surface of said plate beingprovided near its peripherywith a series of recesses and teeth 12extending completely around the upper surface of said plate in acircular form and designed to receive and engage gear wheels hereinafterdescribed.

The numeral 13 indicates the upper plate of the turn-table beingdesigned to operate on the under plate by means of balls 14, said plate13 being loosely mounted on and designed to rotate around, thecenterpole 10, and the numerals 15 and 16 indicate recesses or openingslocated at directly opposite points in the upper plate, said openingsbeing adapted to receive the gear wheels hereinafter described, and topermit these to. extend upwardly therethrough by means of which.

the swing is operated.

The numeral 17 indicates a covering for the upper plate 13 designed toprotect the gearing mentioned from dust and dirt, said covering, likethe plate 13, being loosely secured to the center-pole 10, and designedto rotate around it when the swing is in operation.

The reference numerals 18 are used to indicate brace rods extending fromthe ring-like plate 13 of the turntable to the brackets 19 arranged incircular form around and the usual distance from, the center-pole 10,said brackets being designed to receive the seats 20.

The numerals 21 indicate brace rods extending from the inner side of onebracket to the inner side of the bracket immediately ahead, and thenumerals 22 indicate like brace rods located on the outer side of thebrackets, said brace rods being designed to secure the brackets firmlyto one another at equal distances apart.

Near the upper portion of the center-pole 10 we have rigidly secured theunder plate 23 of a second turntable we employ, the upper plate 24 beingloosely mounted on the center-pole l0 and designed to rotate around itand the plate 23 by means of balls 25, and the numeral 26 indicates acollar, rigidly attached to the upper plate 24, provided withperforations 27 at regular intervals and in a circular manner therein,said perforations being adapted to receive the book ends 28 of supportrods 29, two of which we employ to connect said collar with each bracket19, thus obviously suspending the brackets 1.9 containing the seats 20from the top of the center-pole 10.

The numerals 30 indicate guy wires or cable extend ing from the top ofthe center-pole 10 to posts 31 firmly secured in the ground.

Thus it is obvious that the object of suspending the entire swing fromthe center pole 10 and throwing all of the weight thereon and thus beingable to do away with the track and running gear usually employed under aplatform located immediately under the seats has been accomplished.

The numeral 32 indicates a hollow pipe extending from the inner side ofone of the seats 20 to the recess 16 in the upper plate 13 and thenumeral 33 indicates a cylindrical shaft extending through the channelin said hollow pipe 32, having secured to its forward end a beveled gearwheel 34-. designed to be received by and project upwardly through theopening 16 in the upper plate 13 and to mesh with the recesses andteeth.

12 in the under plate 11, and provided on its outer end with a handwheel 35 designed to be operated by a person sitting on the inner sideof the seat 20. The shaft 33 operates within the channel in the hollowpipe 32 upon two sets of ball bearings 36 and 37 respectively, onelocated near the outer end of said hollow pipe and the other locatednear the inner end of said hollow pipe, thus obviously reducing thefriction.

The numeral 38 indicates a ball ratchet located within the hub of thehand wheel 35.

The numeral 39 indicates a like hollow pipe located directly oppositethe hollow pipe 32 designed to receive a cylindrical shaft provided witha beveled gear wheel, adapted to be received by the openings 15 in theupper plate 13, on one end, a hand wheel on its other end,

all being exactly similar in construction to the hollow pipe 32 and theshaft 33.

In practical operation a person sitting on the inner side of the seat 20provided with the hand wheel 35 A circle swing embodying a center pole,a toothed plate rigidly secured thereto, a revolnble plate mounted onsaid pole, a ring" like plate formed with openings at points overlyingthe teeth of said toothed plate, horizontal brace rods extending in saidrevolnble plate and rigidly secured to said ring-like plate, seatbrackets, hollow shafts sncured to said brackets at one end and to saidring-Jilin plate at their opposite ends, shafts passing through saidhollow shafts and having gears at one end extending through said openingof: said ring-like plate and engaging said toothed plate, operatingwheels on the other ends of said shafts, a. revolnble top plate at theupper end of said center pole, diagonal braces leading to the connectionbetween said hollow shafts and said seat brackets, and fur ther diagonalbraces leading from said top plate to the upper portions of said seatbrackets MILO G. CUMMINGS. SYLVESTICR M. lJllNllAl.

Witnesses ll. M. Snnewrcrz, .T. Cnasn Pen.

